Heat dissipating device

Abstract

A heat dissipation device includes a heat sink and a fan. The heat sink includes two first fins, and a plurality of second fins between the first fins. A locking portion extends outward from each first fin. The locking portions are located higher than the second fins. A sliding guideway is defined in each locking portion. Two flanges extend from two opposite sides of the fan respectively. The flanges are capable of engaging in the guideways of the heat sink to mount the fan to the heat sink.

1 . A heat dissipating device comprising:
 a heat sink comprising two first fins, and a plurality of second fins between the first fins, two locking portions extending from the first fins respectively, the locking portions being located higher than the second fins, two guideways facing to each other being defined in the locking portions respectively; and   
     a fan comprising two flanges arranged at opposite sides thereof, the flanges capable of engaging in the guideways of the heat sink to mount the fan to the heat sink. 
   
   
       2 . The heat dissipating device as described in  claim 1 , wherein a recessed portion is defined in a wall of each guideway, a block protrudes from the corresponding flange to engage in the corresponding recessed portion to fixedly attach the fan to the heat sink. 
   
   
       3 . The heat dissipating device as described in  claim 2 , wherein each of the locking portions comprises a bottom wall extending outward from the top portion of the corresponding first fin, a sidewall extending upward from a free side of the bottom wall, and a top wall extending inward from a top portion of the sidewall, the walls cooperatively form the guideway. 
   
   
       4 . The heat dissipating device as described in  claim 3 , wherein the recessed portion is defined in the bottom wall of the locking portion, the corresponding block protrudes from a bottom surface of the flange of the fan. 
   
   
       5 . The heat dissipating device as described in  claim 3 , wherein the recessed portion is defined in the side wall of the locking portion, the corresponding block protrudes from a side surface of the flange of the fan. 
   
   
       6 . The heat dissipating device as described in  claim 3 , wherein the recessed portion is defined in the top wall of the locking portion, the corresponding block protrudes from a top surface of the flange of the fan. 
   
   
       7 . The heat dissipating device as described in  claim 4 , wherein the recessed portion comprises an arc-shaped bottom surface, the block comprises an arc-shaped top surface to suit the recessed portion. 
   
   
       8 . The heat dissipating device as described in  claim 3 , wherein the bottom wall of the locking portion is generally located in a same plane with top edges of the second fins. 
   
   
       9 . A heat dissipating device comprising: 
     a heat sink comprising a base, a pair of first fins extending from the base, and a plurality of second fins extending from the base between the first fins, a pair of locking portions extending from the first fins respectively, the locking portions defining a pair of guideways facing toward each other; 
     a fan with a pair of flanges formed at opposite sides thereof, the fan being slidably attached to the heat sink via the flanges sliding along the corresponding guideways; and 
     a pair of deformable locking structures respectively formed between the flanges and the corresponding locking portions to lock the fan with the heat sink, the fan being slidable away from the heat sink via the flanges sliding along the corresponding guideways when an external force is exerted thereon to overcome locking forces provided by the locking devices. 
   
   
       10 . The heat dissipating device as described in  claim 9 , wherein each of the locking structures comprises a block with an arc-shaped convex surface formed at one of the flange and the corresponding locking portion, and a recess with an arc-shaped concave surface formed at the other one of the flange and the corresponding locking portion configured to fittingly receive the block to thereby lock the fan with the heat sink. 
   
   
       11 . The heat dissipating device as described in  claim 10 , wherein each of the locking structures comprises a bottom wall extending perpendicularly from the corresponding first fin in a first direction, a sidewall extending perpendicularly from the bottom wall in a second direction perpendicular to the first direction, and a top wall extending perpendicularly from the sidewall in a third direction reverse to the first direction, the guideway of the locking portion being defined between the bottom wall, the sidewall, and the top wall. 
   
   
       12 . The heat dissipating device as described in  claim 11 , wherein the second fins are parallel to each other with a plurality of channels formed therebetween, the channels extend from one side of the heat sink to an opposite side of the heat sink, and the guideways are parallel to the channels. 
   
   
       13 . The heat dissipating device as described in  claim 11 , wherein the bottom walls of the structures are located in a same plane on which the fan is supported, and all of the second fins are not higher than the plane.